Back to campus III Suppose ACT, Inc. wants to update their information from Exercise 34 on the percentage of freshmen that return for a second year of college. a) They want to cut the stated margin of...

Back to campus III Suppose ACT, Inc. wants to update their information from Exercise 34 on the percentage of freshmen that return for a second year of college.

a) They want to cut the stated margin of error in half. How many college freshmen must be surveyed?

b) Do you have any concerns about this sample? Explain.